Abstract

Simultaneous oscillation was observed on several rotational lines from P(14) to P(26) of the 10.6-μm band in a transversely excited atmosphere CO2 laser at low gas pressures. With the increase of pressure, the number of lasing lines reduced and the P(20) line became more dominant. Theoretical analysis has revealed that the changes in the rotational relaxation rate and the stimulated emission rate with gas pressure could account for the observed variation in the laser spectrum.

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